Tractor mounted disk cultivator



S. J. MILLER TRACTOR MOUNTED DISK CULTIVATOR Jan. 30, 1951 Filed May 29,1945 '5 Sheets-Sheet 1 Jan. 30, 1951 5. J. MILLER 2,539,632

TRACTOR MOUNTED DISK CULTIVATOR Filed May 29, 1945 3 Sheets-Sheet 2 Jan.30, 1951 5. J. MILLER TRACTOR MOUNTED DISK CULTIVATOR 5 Sheets-Sheet 3Filed May 29, 1945 fiatenteci jan. 1 9 51 UNITED STATES PATENT OFFICE2,539,632 TRACTOR ll/IOUNTED DISK CULTIVATOR Samuel .51. Miller, CorpusChristi, Tex;

Application May 29, 1945; Serial No. 596,521

7 Claims. 1 This invention relates to a tractor operated disccultivator.

- An object of the invention is to provide an agricultural implement ofthe character described specially designed for pulverizing earth thathas previously been plowed, either in preparation for planting, in somecases, or for cultivation puras a whole, by the numerals 9, ill, Ii andi2. The

poses.

Another object of the invention is to provide a harrow of the characterdescribed which has been particularly designed for pulverizing the earththat has been previously thrown up in beds,

or rows; or the harrow may be used for forming 2 selected elevationabove the ground surface while the harrow is in operation.

As illustrated in Figure 2 there are a plurality of disc units, fourbeing shown in the illustration, although a greater or less number maybe used if desired. These disc units are pivotally mounted relative tothe bar I. These units are designated,

end units 9 and I2 have the rearwardly diverging side bars I3, I4 andI5, l3, respectively, which are braced by the cross braces ll, I3 whoseends are secured to said respective side bars. Clamped to the bar I bythe clamp I9 and the clamp bolts 23 are the plates 2|, 2| having theforwardly directed pairs of arms 22, 22 and 23, 23 to which the forwardends of the side members of the frames 9 and I2 are pivoted on ahorizontal axis;

1 It will be noted that these pivotal points are an ing each gang ofdiscs whereby the same may be 'T Figure 2 is an enlarged, fragmentary,plan view.

' Figure 3 is a fragmentary, side elevation.

' Figure 4 is a top, plan view of an anchor employed; and

' Figure 5 is a fragmentary, side elevation of the harrow.

Referring now more particularly to the drawings wherein like numerals ofreference designate the same parts in each of the figures, the numeral Idesignates a transverse bar to which the side members 2, 2 of an A-frameare connected by means of the clamps 3, 3, which are clamped to said barI. These side members 3, 3 converge forwardly and are pivotallyconnected to the tractor hanger 4 so as to pivot on a transverse axiswhereby the bar I may be moved up and down.

Mounted in suitable bearings on the tractor there is a transverse shaft5 having the rearwardly extended rigid arms 6, 6 connected thereto anddepending from the free ends of these arms are the chains 1, I which areconnected to the side members 2, 2. By suitably rotating the shaft 5 inone direction the side members 2, 2 of the frame may be elevated andwhen rotated in the other direction said frame may be lowered. Therotation of the shaft 5 is under the control of the operator by suitablemechanism mounted on the tractor.

Anchored to the ends of the bar I and extending forwardly therefrom arethe frames 8, 8, each frame 8 having ro-tatably mounted thereon a groundwheel as 8a which holds the bar I at a plate 35 and the vertical plate36.

appreciable distance in front of the bar I and the corresponding frames9 and I2 extend rearwardly underneath the bar I.

The intermediate plates 24 are clamped to the bar I by means of theclamp 25 and clamp bolts 26 and the lower ends of the plates 25 have thespaced, forwardly turned ears 2?, 2'! and 28, 28 to which thecorresponding side members 29, 30 of the frame It] and 3|, 32 of theframe II are pivoted on horizontal axis, These frames IE5 and II extendrearwardly underneath the bar I. The frames Ill and II are braced by thecross braces 33,- 33 whose ends are anchored to said respective sidemembers.

Fastened to the rear ends of the respective side members of the framesare anchors such as 34 of a special type.

This anchor is shown in detail in Figure 4 and is of substantiallyangular shape having the top Secured to the rear ends of the side barsof the respective disc units are similar anchor plates, the platesof'the unit 9 being designated by the numerals 31, 31', the plates ofthe-unit I0 being designated by the numerals 38', 38, the plates of theunit I I being designated by the numerals 39, 39, and the plates of theunit I2 being designated by the numerals 40, M3. The plates of therespective units extend inwardly toward each other, as

shown in Figure 2. The anchors 34 are fastened clamped to said anchorplate by a clamp bolt such' Each anchor plate has an arcuate slot 42thereto and a clamp bolt as 43 is fitted through to the underside of therespective plates, The top plate 35 of each anchor is fitted closelyagainst the underside of the corresponding anchor plate with-its headclamped against the corresponding anchor plate.

' Fastened'to the plate 360i each anchor 34 are the inverted U-shapedyokes 4 the free ends of whose side arms have the bearings 45, 45 thereon in which the axle 45 is mounted to rotate and fixed on these axles 46are the concave-convex discs 47 having sharp cutting edges. Each plate36 has the oblong arcuate slots 48, 48; and clamp bolts 49 are fittedthrough the cross bar of each yoke and through the slots 48 and by meansof which the yoke may be clamped to the plate 36.

Therefore two gangs of concavo-convex cutting discs depend from each ofthe units 9, I0, [1- and I2. By loosening the clamp bolt 43 the,corresponding gang of discs may be adjusted about a vertical axis andsaid clamp bolt then tightened to hold said gang at said point ofadjustment. Also each gang of discs can be adjusted about a horizontalaxis by loosening the clamp bolts 49 and making the adjustment and then,again ti hten n s id bolts.

It. will be noted from an inspection of Figure 1 that the concave sidesof, the, discs, face forwards ly and it is to be further noted that thediscs of h o e e of ach disc unit. face rwardly on ccnverging lines sothat the discs of anyparticulav disc n w row the. oose i nwardly withrespect to the line of travel of said unit so as to form he ea h in o.ri es or beds. or so as to follow the contour of said ridges, or beds,if previously formed.

The anchor plates 37, 3'1; 38, 38; 39, 39 ,and 40, 40 of the respectivedisc units are connected by the H-frames 50, 5|, 52 and 53v forstrength, as h wn in Fi u e 21 Eastened to the plates 21 and 24 andupstanding therefrom are the standards 54, 54. There are the chains 55whose forwardends, are vconnected to the upper ends of the standardsj iand whose rear ends are connected to the corresponding H -frarr.-es 5t,51, 52 and 53. These chains are of sufficient length so thatthey will beslack while the harrow discs are working incontact with the groundsurface but when the transverse bar I is lifted, V by the manipulatienof the shaft 5,- as hereinabove explained, these chains 55 willeventually become taut and will lift the disc. units so that-th discs llclear he roundsuria e when the end of a row has been reached, and it is.

desired to turn the harrow around or when it is des r d o an m he na rowrom place. to place.

h i g nd e tiqnareillustrati m re y h l the b ac rinqi o the nvent nwill be defined by the appnded claims.

What I claim is:

.1- In a ar o a ans se su por n r a, r m Whose forward nd s p qtallconne t d to, a ra and 0' .v h rea e d. f whi h sa d her s mo n d, an eame idl se ur d to each end of the bar and extended forwardly, a groundwheel on the forward end of each end frame, disc units pivoted to, andextending rearwardly from, said bar and aplurality of gangs of discsmounted on each unit.

2. In a harrow, a frame whose forward, end is adapted to be connected toa tractor, a transe verse bar supported on said frame, an end framerigidly secured to each end of the bar and extended forwardly, a groundwheel on the fOI'-, ward end of each end frame, disc units pivoted toand extending rearwardly from said bar, a gang of rotatable discs oneach unit, flexible members connected, at their rear ends, to said discunits and means connecting the forward and of said flexible members tothe bar whereby the disc units will be lifted when the bar is elevated.

3. In a harrow, a disc unit frame, an anchor. plate. e r to th fram an.anchor secured;

underneath said plate and adjustable about an approximately verticalzaxis a t l-shaped frame on said anchor and adjustable about anapproximately horizontal axis, a gang of discs rotatably mounted on saidlast mentioned frame, means for connecting said unit to a tractor, saidunit being connected to said connecting means to pivot about anapproximately horizontal axis.

4, In a harrow, a transverse bar, means connected to the bar andextended forwardly and adapted to connect said bar to a tractor to moveon a transverse axis, disc units pivoted to, and extended rearwardlyfrom, said ban, a gang. of discs mounted on each unit and adjustablethere? on on vertical and horizontalv axis, av frame secured to each endofsa drbar anaex ward y nd a ound Wheel r a y m d Qnih forward nd-ofveachi rame.

5. In a ar o a t ansverse bar, a frame whose forward end is connected tothe bar to pivoton a transverse axis, an anchqr secured to, the rear endof each frame, said anchor including a. top plate and a dependingvertical plate secured to the top plate, an anchor plate secured to therear end of each frame and having an arcuate lot, said top plate beingfitted against the under: side of said anchor plate, a clamp secured to,said p plate and Wo king t rou h sa d s t d having clamp means on theupper end thereof tov clarnp said anchor a selected position, aninverted U-shaped yoke secured to said vertical plate and adjustablethereon, an; axle mounted to rotate in bearings in the free ends of saidyoke n a. gang of d n said. ax

6. In a harrow, a transverse bar, a frame whose forward end is pivotedto Inove'on a transverse axis and is supported by said bar and; extendsrearwardly therefrom, said frame includingrearwardly diverging sidebars, an H-frame connecte i s. rear e ds s i r and-- a l ra y of, gangsof rotatable cutting discs dependingfrqrn the rear end; of said frame,

7. In a, harrow, a frameWllOSe forward end is, adapted to be connectedto atractor, a transverse bar supported on said frame, plates clamped tosaid bar in spaced relation, forward extensions on each of said platesbeneath the bar and spaced apart, a plurality of disc units, each unitincluding side members which diverge rearwardly, the forward ends, ofsaid side members extending underneath said bar and being pivoted to thefor.- wa nd of h -q r sp nd s x nsion so as, to pivot on horizontal axesanddiscs carried y me er nds o h respec i s- MUEL. J- M LLER-REFERENCES, CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

